FCPY
Copy 8-bit floating-point immediate to vector elements (predicated)
Copy a floating-point immediate into each active element in the destination vector. Inactive elements in the destination vector register remain unmodified.
Green
True
True
True
This instruction is used by the alias
FMOV (immediate, predicated)
Unconditionally
The alias is always the preferred disassembly.
0
0
0
0
0
1
0
1
0
1
1
1
0
FCPY <Zd>.<T>, <Pg>/M, #<const>
if !IsFeatureImplemented(FEAT_SVE) && !IsFeatureImplemented(FEAT_SME) then UNDEFINED;
if size == '00' then UNDEFINED;
constant integer esize = 8 << UInt(size);
constant integer g = UInt(Pg);
constant integer d = UInt(Zd);
constant bits(esize) imm = VFPExpandImm(imm8, esize);
<Zd>
Is the name of the destination scalable vector register, encoded in the "Zd" field.
<T>
Is the size specifier,
size
<T>
00
RESERVED
01
H
10
S
11
D
<Pg>
Is the name of the governing scalable predicate register, encoded in the "Pg" field.
<const>
Is a floating-point immediate value expressible as ±n÷16×2^r, where n and r are integers such that 16 ≤ n ≤ 31 and -3 ≤ r ≤ 4, i.e. a normalized binary floating-point encoding with 1 sign bit, 3-bit exponent, and 4-bit fractional part, encoded in the "imm8" field.
CheckSVEEnabled();
constant integer VL = CurrentVL;
constant integer PL = VL DIV 8;
constant integer elements = VL DIV esize;
constant bits(PL) mask = P[g, PL];
bits(VL) result = Z[d, VL];
for e = 0 to elements-1
if ActivePredicateElement(mask, e, esize) then
Elem[result, e, esize] = imm;
Z[d, VL] = result;